IT Infrastructure & Network Engineer

Description

• Provide advanced troubleshooting and escalation support for network and infrastructure incidents.
• Design, configure, and manage Cisco network infrastructures (routing, switching, WAN/LAN, VPN).
• Provide technical support and consulting to clients on infrastructure and network security improvements.
• Support Microsoft 365, Exchange Online, and Azure AD administration and migration projects.
• Deploy, operate, and support Cisco and Fortinet firewalls, including rule management, VPN setup, and security monitoring.
• Develop and maintain network and system documentation, topology diagrams, and configuration records.
• Collaborate with senior engineers and security teams on infrastructure hardening and security policy enforcement.
• Oversee virtualization environments (VMware, Hyper-V) including performance tuning and backup operations.
• Administer and maintain Patch Management Systems (PMS) for operating systems and applications.
• Implement, manage, and support Network Access Control (NAC) systems for client environments.
• Manage Windows Server environments (Active Directory, DNS, DHCP, GPO) and perform system maintenance.
• Conduct security audits, patch management, and compliance assessments.

Requirements

We are seeking an experienced IT Infrastructure & Network Engineer to join our Managed Service Provider (MSP) team. This role focuses on the design, implementation, and support of Cisco-based network infrastructures, Microsoft systems, and security solutions including firewall, NAC, and PMS platforms. The ideal candidate will have hands-on experience managing enterprise-level infrastructure environments, with strong technical depth across both network operations and security management. You will play a key role in maintaining client environments, optimizing performance, and ensuring compliance with security best practices.

• CompTIA Security+ or similar (a plus)
• PMS (Patch Management System) operation, automation, and reporting.
• Proactive in identifying and resolving performance and security issues.
• Scripting and automation experience (PowerShell, Python preferred).
• Professional experience in IT infrastructure and network engineering, preferably in an MSP or multi-client environment.
• Advanced Cisco configuration (BGP, OSPF, VLANs, ACLs, VPNs).
• Korean-English Bilingual
• Firewall deployment and management (Cisco ASA, Firepower, FortiGate).
• Microsoft infrastructure administration (Windows Server, Active Directory, Azure AD).
• Microsoft Certified: Azure Administrator Associate or M365 Administrator (Preferred)
• Sonicwall / Fortinet or equivalent firewall certification (Preferred)
• Capable of working independently and mentoring junior engineers.
• Virtualization (VMware, Hyper-V) and backup management (Veeam, Datto).
• Network monitoring tools (SolarWinds, N-central, PRTG, etc.).
• Strong documentation and process-oriented mindset.
• Strong analytical and diagnostic skills across complex, multi-client environments.
• Cisco CCNP (Required)
• Excellent communication and customer service abilities.

Benefits

Training + Development

Interview process

Visa Sponsorship

Security clearance